goma: ios builder requires Mac 10.15

Bug: 1125449, 1121776, 1123704
Change-Id: Ie8c636cc69f3c038f6b4b1162b2b2ba813571122
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2394844Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@google.com>
Commit-Queue: Fumitoshi Ukai <ukai@google.com>
Cr-Commit-Position: refs/heads/master@{#804686}

infra/config/generated/cr-buildbucket.cfg

@@ -15680,7 +15680,7 @@ buckets {
       dimensions: "builder:Chromium iOS Goma RBE ToT"
       dimensions: "cores:4"
       dimensions: "cpu:x86-64"
-      dimensions: "os:Mac-10.14"
+      dimensions: "os:Mac-10.15"
       dimensions: "pool:luci.chromium.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -16489,7 +16489,7 @@ buckets {
       swarming_tags: "vpython:native-python-wrapper"
       dimensions: "builder:ios-device-goma-canary-clobber"
       dimensions: "cpu:x86-64"
-      dimensions: "os:Mac"
+      dimensions: "os:Mac-10.15"
       dimensions: "pool:luci.chromium.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -16514,7 +16514,7 @@ buckets {
       swarming_tags: "vpython:native-python-wrapper"
       dimensions: "builder:ios-device-goma-latest-clobber"
       dimensions: "cpu:x86-64"
-      dimensions: "os:Mac"
+      dimensions: "os:Mac-10.15"
       dimensions: "pool:luci.chromium.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -16539,7 +16539,7 @@ buckets {
       swarming_tags: "vpython:native-python-wrapper"
       dimensions: "builder:ios-device-goma-rbe-canary-clobber"
       dimensions: "cpu:x86-64"
-      dimensions: "os:Mac"
+      dimensions: "os:Mac-10.15"
       dimensions: "pool:luci.chromium.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"
@@ -16564,7 +16564,7 @@ buckets {
       swarming_tags: "vpython:native-python-wrapper"
       dimensions: "builder:ios-device-goma-rbe-latest-clobber"
       dimensions: "cpu:x86-64"
-      dimensions: "os:Mac"
+      dimensions: "os:Mac-10.15"
       dimensions: "pool:luci.chromium.ci"
       exe {
         cipd_package: "infra/recipe_bundles/chromium.googlesource.com/chromium/tools/build"

infra/config/subprojects/goma/goma.star

@@ -112,7 +112,7 @@ fyi_goma_canary_builder(
     name = "ios-device-goma-canary-clobber",
     caches = [xcode_cache.x12a8189n],
     cores = None,
-    os = os.MAC_ANY,
+    os = os.MAC_10_15,
     properties = {
         "xcode_build_version": "12a8189n",
     },
@@ -188,7 +188,7 @@ fyi_goma_rbe_canary_builder(
     name = "ios-device-goma-rbe-canary-clobber",
     caches = [xcode_cache.x12a8189n],
     cores = None,
-    os = os.MAC_ANY,
+    os = os.MAC_10_15,
     properties = {
         "xcode_build_version": "12a8189n",
     },
@@ -273,7 +273,7 @@ fyi_goma_latest_client_builder(
     name = "ios-device-goma-latest-clobber",
     caches = [xcode_cache.x12a8189n],
     cores = None,
-    os = os.MAC_ANY,
+    os = os.MAC_10_15,
     properties = {
         "xcode_build_version": "12a8189n",
     },
@@ -363,7 +363,7 @@ fyi_goma_rbe_latest_client_builder(
     name = "ios-device-goma-rbe-latest-clobber",
     caches = [xcode_cache.x12a8189n],
     cores = None,
-    os = os.MAC_ANY,
+    os = os.MAC_10_15,
     properties = {
         "xcode_build_version": "12a8189n",
     },
@@ -486,7 +486,7 @@ goma_mac_builder(
     name = "Chromium iOS Goma RBE ToT",
     caches = [xcode_cache.x12a8189n],
     goma_backend = goma.backend.RBE_TOT,
-    os = os.MAC_10_14,
+    os = os.MAC_10_15,
     properties = {
         "xcode_build_version": "12a8189n",
     },